Table 2. Univariate analysis of DFS and OS.

Characteristic		DFS, years		OS, years
		Median	p	Median	p
Sex	Male Female	3.0 NR	0.015	4.9 NR	0.047
Age, years	<65 ≥65	NR 7.9	0.225	NR 4.3	0.098
Primary site	Parotid gland Other	NR NR	0.990	7.7 NR	0.510
Histological type	Salivary duct carcinoma Other	1.8 NR	<0.001	3.1 NR	<0.001
Stage T	pT1-2 pT3-4	NR 3.2	0.023	NR 3.4	0.001
Stage N	pN0-1 pN2-3	NR 2.8	<0.001	7.8 2.5	<0.001
Grade	High Intermediate/Low	1.8 NR	<0.001	3.1 NR	<0.001
Lymphovascular invasion	Yes No	2.0 NR	0.001	3.2 NR	0.001
Perineural invasion	Yes No	3.6 NR	0.028	4.0 NR	0.004
Carcinoma ex pleomorphic	Yes No	NR NR	0.283	4.9 7.7	0.322
Extracapsular spread	Yes No	3.0 NR	0.094	2.5 NR	<0.001
Facial nerve sacrifice	Yes No	3.2 NR	0.613	4.9 NR	0.509
ERBB2 status	Positive Negative	1.8 1.3	0.782	5.1 3.2	0.317
Androgen receptor status	Positive Negative	1.8 NR	0.682	3.2 5.3	0.578
NR—not reached.